20689444862 has 16 divisors (see below), whose sum is σ = 31361132880. Its totient is φ = 10235781888.

The previous prime is 20689444861. The next prime is 20689444903. The reversal of 20689444862 is 26844498602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20689444861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1143188 + ... + 1161144.

It is an arithmetic number, because the mean of its divisors is an integer number (1960070805).

Almost surely, 2^20689444862 is an apocalyptic number.

20689444862 is a deficient number, since it is larger than the sum of its proper divisors (10671688018).

20689444862 is a wasteful number, since it uses less digits than its factorization.

20689444862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23995.

The product of its (nonzero) digits is 5308416, while the sum is 53.

The spelling of 20689444862 in words is "twenty billion, six hundred eighty-nine million, four hundred forty-four thousand, eight hundred sixty-two".